On Tue, Apr 17, 2007, Edward Chan wrote:

> The problem with CryptoAPI is that it doesn't give you direct access to
> the shared secret.  But I suspect it is wrong since the
> encryption/decryption fails (I encrypt something, and decrypt it, to
> make sure it is the same as the original).
> 

It doesn't give you *direct* access to the shared secret or indeed other types
of symmetric or asymmetric keys but there are back door ways of getting hold
of the key anyway.

One way is to encrypt the key using a public key to which you know the
corresponsing private key and then obtaining the unencrypted result using
OpenSSL. Another trick is in an MS KB article somewhere which relies on using
a key with an exponent of 1.

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
Funding needed! Details on homepage.
Homepage: http://www.drh-consultancy.demon.co.uk
______________________________________________________________________
OpenSSL Project                                 http://www.openssl.org
User Support Mailing List                    openssl-users@openssl.org
Automated List Manager                           [EMAIL PROTECTED]

Reply via email to